Acoustic signal associated with the bursting of a soap film which initially closes an overpressurized cavity. Experiment and theory.

Abstract : We report an experimental study of the sound produced by the bursting of a thin liquid film, which initially closes an overpressurized cylindrical cavity. There is a need for a deep understanding of the phenomenon, which can be very useful in numerous practical cases. For instance, in the nature, the volcanologists observe the bursting of large, elongated, gas-bubbles at the surface of lava lakes and record the associated sound emission. One can wonder which pieces of information they can get from such acoustic measurements. For a didactic purpose, we provide also the reader with all the theoretical background necessary for the understanding of the physical processes that govern the various characteristics of the acoustic signals: the cavity geometry governs the frequency; the viscous dissipation and the radiation are responsible for the damping; the acoustic energy informs about the characteristic time associated with the film-rupture more than about the energy initially loaded in the cavity.
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Valérie Vidal, Jean-Christophe Géminard, Thibaut Divoux, Francisco Melo. Acoustic signal associated with the bursting of a soap film which initially closes an overpressurized cavity. Experiment and theory.. European Physical Journal B: Condensed Matter and Complex Systems, Springer-Verlag, 2006, 54 (3), pp.321-339. ⟨10.1140/epjb/e2006-00450-0⟩. ⟨ensl-00124832⟩

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